use Bitrix\Sale;
      Main\EventManager::getInstance()->addEventHandler(
       'sale',
       'OnSaleOrderSaved',
       function () {
             //echo '<pre>';print_r($order);echo '</pre>';
            $string = '<sc ript> console.log("******************** OrdernSaleOrderSaved ********************"); </sc ript>';
            echo $string;
      });

$eventManager = \Bitrix\Main\EventManager::getInstance(); 
$eventManager->addEventHandler('sale', 'OnBeforeSaleBasketItemSetField', 'roundPrice');  
 
function roundPrice(\Bitrix\Main\Event $event)

   {
      $name = $event->getParameter('NAME');
       $value = $event->getParameter('VALUE');

       // округляем цену
       if ($name === 'PRICE')
       {
           $value = round($value, 0, PHP_ROUND_HALF_DOWN);
           $event->addResult(
               new \Bitrix\Main\EventResult(
                   \Bitrix\Main\EventResult::SUCCESS, array('VALUE' => $value)
               )
           );
       }
       
       // округляем скидку
       if ($name === 'DISCOUNT_PRICE')
       {
           $value = round($value, 0, PHP_ROUND_HALF_UP);
           $event->addResult(
               new \Bitrix\Main\EventResult(
                   \Bitrix\Main\EventResult::SUCCESS, array('VALUE' => $value)
               )
           );
       }
   }